Cosmetic brush



FIG. 1 is a top plan view of a cosmetic brush, showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being the same;

FIG. 3 is a side elevational view thereof, the other side elevation being the same;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view of a second embodiment of a cosmetic brush;

FIG. 6 is a front elevational view thereof, the rear elevational view being the same;

FIG. 7 is a side elevational view thereof, the other side elevation being the same; and

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a cosmetic brush, as shown and described. 